(d) Inelastic seismic design coefficients such as; structural ductility factor (), ductility reduction factor (R), structural over-strength factor () and their distributions using nonlinear static procedure, namely push-over analysis.
The limitations and adequacy of each analysis procedure in predicting demand and capacities of buildings with specific amount of irregularity will also be evaluated by comparison with the results obtained from "exact" nonlinear time-history analysis procedure. The study is expected to define, 'limit states' of uniform setbacks, for the application of each procedure determining seismic demands and capacities.
Design of a building with vertical geometric irregularity to resist earthquake loads is a challenging problem that structural engineering needs to overcome early in the conceptual design phase. ...